Detection of Gamma-rays around 1TeV from RX J0852.0-4622 by CANGAROO-II

(Astrophys. J. Lett., in press)

H. Katagiri, R. Enomoto, L.T. Ksenofontov, M. Mori, Y. Adachi, A. Asahara, G.V. Bicknell, R.W. Clay, Y. Doi, P.G. Edwards, S. Gunji, S. Hara, T. Hara, T. Hattori, Sei. Hayashi, C. Itoh, S. Kabuki, F. Kajino, A. Kawachi, T. Kifune, R. Kiuchi, H. Kubo, T. Kurihara, R. Kurosaka, J. Kushida, Y. Matsubara, Y. Miyashita, Y. Mizumoto, H. Muraishi, Y. Muraki, T. Naito, T. Nakase, D. Nishida, K. Nishijima, M. Ohishi, K. Okumura, J.R. Patterson, R.J. Protheroe, N. Sakamoto, D.L. Swaby, T. Tanimori, H. Tanimura, G.J. Thornton, K. Tsuchiya, S. Watanabe, T. Yamaoka, S. Yanagita, T. Yoshida, T. Yoshikoshi

We have detected gamma-ray emission at the 6sigma level at energies greater than 500GeV from the supernova remnant RX J0852.0-4622 (G266.2-1.2) using the CANGAROO-II Imaging Atmospheric Cherenkov Telescope (IACT). The flux was 0.12 times of that of Crab at 1TeV. The signal centroid is consistent with the peak of the X-ray emission in the north-west rim of the remnant.